Originally Posted by dmhines

I would think that Ford updated your calibration to the latest and greatest when they replaced your engine. Or is your tuner still using ZFK0 for the base tune?

Originally Posted by Automatic 5.0

Math not your strong subject in school?

$.45 x 14 gallons = $6.30 per fill up.

I have money so no worries there. I was sick of putting the "required premium" in my Trans Am for 20 years just to go back and forth to work. Even $6.30 per week doesn't sound too bad but I hate to pay it. What I do not understand is why 93 is now 45 cents more per gallon than regular. It was 20 cents up until a few years ago. I guess that octane is part gold?